/* wf_acos.c -- float version of w_acos.c.
 * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
 */

/*
 * ====================================================
 * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
 *
 * Developed at SunPro, a Sun Microsystems, Inc. business.
 * Permission to use, copy, modify, and distribute this
 * software is freely granted, provided that this notice
 * is preserved.
 * ====================================================
 */

/*
 * wrap_acosf(x)
 */

#include "fdlibm.h"
#include <errno.h>

#ifdef _HAVE_STDC
    float acosf(float x)        /* wrapper acosf */
#else
    float acosf(x)          /* wrapper acosf */
    float x;
#endif
{
#ifdef _IEEE_LIBM
    return __ieee754_acosf(x);
#else
    float z;
    struct exception exc;
    z = __ieee754_acosf(x);
    if(_LIB_VERSION == _IEEE_ || isnan(x)) return z;
    if(fabsf(x)>(float)1.0) {
        /* acosf(|x|>1) */
        exc.type = DOMAIN;
        exc.name = "acosf";
        exc.err = 0;
        exc.arg1 = exc.arg2 = (double)x;
        exc.retval = nan("");
        if (_LIB_VERSION == _POSIX_)
           Djy_SaveLastError(EDOM);
        else if (!matherr(&exc)) {
           Djy_SaveLastError(EDOM);
            }
            if (exc.err != 0)
           Djy_SaveLastError(exc.err);
        return (float)exc.retval;
    } else
        return z;
#endif
}

#ifdef _DOUBLE_IS_32BITS

#ifdef __STDC__
    double acos(double x)
#else
    double acos(x)
    double x;
#endif
{
    return (double) acosf((float) x);
}

#endif /* defined(_DOUBLE_IS_32BITS) */
